OSLO - A rise in concentrations of a powerful greenhouse gas over the Arctic after a decade of stability is stirring worries about a possible thaw of vast stores trapped in permafrost, experts said.
Levels of methane in the atmosphere rose 0.6 percent in 2008, according to preliminary data from the Zeppelin station on a remote island in the Norwegian Arctic, after a similar 0.6 percent gain in 2007, Norwegian officials said.
|“The biggest worry is that there are emissions from the permafrost, and also from wetlands in the northern region.”|
Catherine Lund Myhre
Norwegian Institute for Air Research.
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